立彬の日本語
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共通語， きょうつうご
1. common language, lingua franca 2. standard language (language variety understood throughout a country)
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英語は今や世界のいくつかの国の共通語になっています。
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English has now become the common language of several nations in the world.
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ペルーの共通語は何ですか。
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What is the common language in Peru?
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